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Re: Have the velociraptors in a test system now, checkout the errors.

To: Justin Piszcz <jpiszcz@xxxxxxxxxxxxxxx>
Subject: Re: Have the velociraptors in a test system now, checkout the errors.
From: Bill Davidsen <davidsen@xxxxxxx>
Date: Thu, 18 Dec 2008 18:14:24 -0500
Cc: Redeeman <redeeman@xxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-raid@xxxxxxxxxxxxxxx, xfs@xxxxxxxxxxx, smartmontools-support@xxxxxxxxxxxxxxxxxxxxx
In-reply-to: <alpine.DEB.1.10.0812171820200.26527@xxxxxxxxxxxxxxxx>
Organization: TMR Associates Inc, Schenectady NY
References: <alpine.DEB.1.10.0812060426280.3494@xxxxxxxxxxxxxxxx> <49405A94.8080601@xxxxxxx> <1229225303.16555.149.camel@localhost> <4949645F.4030407@xxxxxxx> <alpine.DEB.1.10.0812171820200.26527@xxxxxxxxxxxxxxxx>
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Justin Piszcz wrote:

Calls itself "WDC WD10EACS-00D" in /sys if that helps. I could dig out the packing slip if it matters. Runs nicely so far, and if the SMART temperature probe is correct, very cool:

/dev/sda: ST3750640AS: 43 C
/dev/sdb: WDC WD10EACS-00D6B1: 31 C
/dev/sdc: ST3750640AS: 44 C
/dev/sdd: ST3750640AS: 46 C

I don't totally trust the temps, there is a LOT of 18C air going into that box, because it has a lot coming out the back and side.

Hmm do you have a picture of those seagates? Seems like a lack of airflow there
or do they just run really hot?  Also, how many head unload/loads has the
1.0TB GP drive performed, that was one of my concerns when I was looking at
disks.

How about a diagram:

__________________________________________________
                                                 |
                                                 |
                                                 |
                                                 |
                                                 |
                                                 |
                                                 |
                                                 |
                                                 |
                                                 |
                                                 |
                                --empty--        |
                                (seagate)        |
                                (WD)             |
                                (seagate)        | <--- case
                                (seagate)        |
                                --empty--        |
__________________________________________________|


That's about how the drives sit in the case, air vents are in the front of the case, fans in back pulling air out.

--
Bill Davidsen <davidsen@xxxxxxx>
 "Woe unto the statesman who makes war without a reason that will still
be valid when the war is over..." Otto von Bismark

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